Explore topic-wise MCQs in Digital Circuits.

This section includes 2251 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Circuits knowledge and support exam preparation. Choose a topic below to get started.

2201.

 84 * 29 + 365 = ?

A. 2436
B. 2801
C. - 2801
D. - 2071
Answer» E.
Discussion
2202.

 9 3/4 + 7 2/17 - 9 1/15 = ?

A. 7 719/1020
B. 9 817/1020
C. 9 719/1020
D. 7 817/1020
Answer» E.
Discussion
2203.

 (4300731) - ? = 2535618

A. 1865113
B. 1775123
C. 1765113
D. 1675123
Answer» D. 1675123
Discussion
2204.

 3251 + 587 + 369 - ? = 3007

A. 1250
B. 1300
C. 1375
D. 1200
Answer» E.
Discussion
2205.

 7589 - ? = 3434

A. 4242
B. 4155
C. 1123
D. 11023
Answer» C. 1123
Discussion
2206.

 What is the remainder when 263251 is divided by 9?

A. 8
B. 3
C. 6
D. 1
Answer» E.
Discussion
2207.

 Find the greatest number which leaves the same remainder when it divides 25, 57 and 105.

A. 18
B. 8
C. 12
D. 16
Answer» E.
Discussion
2208.

 Find the greatest four digit number which leaves respective remainders of 2 and 5 when divided by 15 and 24.

A. 9974
B. 9125
C. 9565
D. None of these
Answer» E.
Discussion
2209.

 Two numbers have a H.C.F of 16 and a product of two numbers is 2560. Find the L.C.M of the two numbers?

A. 140
B. 150
C. 160
D. 170
Answer» D. 170
Discussion
2210.

 Find the greatest number which divides 83, 125 and 209 leaving the same remainder in each case.

A. 19
B. 17
C. 42
D. 23
Answer» D. 23
Discussion
2211.

 Find the smallest number which when divided by 13 and 16 leaves respective remainders of 2 and 5.

A. 187
B. 197
C. 207
D. 219
Answer» C. 207
Discussion
2212.

 What is the greater of the two numbers whose product is 2560, given that the sum of the two numbers exceeds their difference by 64?

A. 90
B. 100
C. 110
D. None of these
Answer» E.
Discussion
2213.

 The product of two successive numbers is 4556. Which of the following is the larger of the two numbers?

A. 68
B. 67
C. 78
D. 63
Answer» B. 67
Discussion
2214.

 The sum of five consecutive odd numbers of set p is 435. What is the sum of five consecutive numbers of another set q. Whose largest number is 45 more than the largest number of set p?

A. 530
B. 670
C. 730
D. 770
Answer» C. 730
Discussion
2215.

 What is the least number to be subtracted from 696 to make it a perfect square?

A. 1
B. 16
C. 20
D. 71
Answer» D. 71
Discussion
2216.

 The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers?

A. 296
B. 252
C. 344
D. 388
Answer» D. 388
Discussion
2217.

 Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case.

A. 384
B. 391
C. 388
D. 386
Answer» B. 391
Discussion
2218.

 A gardener wants to plant trees in his garden in such a way that the number of trees in each row should be the same. If there are 4 rows or 5 rows or 6 rows, then no tree will be left. Find the least

A. 30
B. 60
C. 120
D. 240
Answer» C. 120
Discussion
2219.

 If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers.

A. 50
B. 30
C. 125
D. 25
Answer» E.
Discussion
2220.

 Find the least number with which 16200 should be multiplied, to make it a perfect cube.

A. 36
B. 48
C. 45
D. 360
Answer» D. 360
Discussion
2221.

 Find the smallest number which should be multiplied with 520 to make it a perfect square.

A. 30
B. 120
C. 55
D. None of these
Answer» E.
Discussion
2222.

 Find the number of factors of 300 excluding 1 and itself.

A. 18
B. 14
C. 16
D. 15
Answer» D. 15
Discussion
2223.

 In each of the following numbers, what should be the missing digit in the indicated place such that the number is a multiple of 11?

A. 3
B. 2
C. 8
D. 5
Answer» D. 5
Discussion
2224.

 Simplify the 121 * 175 + 363 * 275

A. 363000
B. 328100
C. 316600
D. None of these
Answer» E.
Discussion
2225.

 What should be the least number to be added to the 51234 number to make it divisible by 9?

A. 6
B. 4
C. 3
D. 5
Answer» D. 5
Discussion
2226.

 Which of the following number is divisible by 4 and 9?

A. 2368
B. 2736
C. 3954
D. 3814
Answer» C. 3954
Discussion
2227.

 If all the fractions 3/10, 1/16, 4/11, 2/9, 1/7, 5/14 and 5/24 arranged in descending order of their values, then which one will be the third?

A. 1/16
B. 2/9
C. 3/10
D. 4/11
Answer» D. 4/11
Discussion
2228.

 When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number?

A. 97
B. 103
C. 99
D. 101
Answer» C. 99
Discussion
2229.

 If 4 2/3 is subtracted form 10 1/2 and the difference is multiplied by 450, then what is the final answer?

A. 2725
B. 2675
C. 2875
D. None of these
Answer» E.
Discussion
2230.

 By how much is 3/5th of 875 greater than 2/3 of 333?

A. 199
B. 303
C. 362
D. 233
Answer» C. 362
Discussion
2231.

 A man engaged a servant on the condition that he would pay him Rs.900 and a uniform after one year service. He served only for 9 months and received uniform and Rs.650, find the price of the uniform?

A. Rs.80
B. Rs.85
C. Rs.90
D. Rs.100
Answer» E.
Discussion
2232.

 A man engaged a servant on the condition that he would pay him Rs.710 and a uniform after a year service. He served only for 8 months and got Rs.460 and a uniform. Find the price of the uniform?

A. Rs.40
B. Rs.30
C. Rs.25
D. Rs.20
Answer» B. Rs.30
Discussion
2233.

 A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent?

A. 6
B. 8
C. 9
D. 10
Answer» E.
Discussion
2234.

 How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers?

A. 1200
B. 1092
C. 1082
D. 1192
Answer» C. 1082
Discussion
2235.

 How many figures are required for numbering the pages of a book containing 1000 pages?

A. 6489
B. 3892
C. 2893
D. 2883
Answer» D. 2883
Discussion
2236.

 How many figures are required to number the pages the pages of a book containing 365 pages?

A. 987
B. 977
C. 967
D. 897
Answer» B. 977
Discussion
2237.

 Sum of two numbers is 80. Greater number exceeds by 5 from four times of the smaller. Find the numbers?

A. 65, 15
B. 64, 16
C. 62, 18
D. 60, 20
Answer» B. 64, 16
Discussion
2238.

 Sum of two numbers is 15. Two times of the first exceeds by 5 from the three times of the other. Then the numbers will be?

A. 6, 9
B. 10, 5
C. 7, 8
D. 9, 6
Answer» C. 7, 8
Discussion
2239.

 Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers?

A. 12, 9
B. 10, 5
C. 12, 7
D. 11, 6
Answer» D. 11, 6
Discussion
2240.

 Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number?

A. 240
B. 180
C. 160
D. 140
Answer» C. 160
Discussion
2241.

 A number exceeds by 25 from its 3/8 part. Then the number is?

A. 32
B. 35
C. 39
D. 40
Answer» E.
Discussion
2242.

THE_QUANTITY_OF_DOUBLE_WORD_IS?$

A. 16 bits
B. 32 bits
C. 64 bits
D. 8 bits
Answer» C. 64 bits
Discussion
2243.

Representation of hexadecimal number (6DE)H in decimal ?

A. 6 * 16<sup>2</sup> + 13 * 16<sup>1</sup> + 14 * 16<sup>0</sup>
B. 6 * 16<sup>2</sup> + 12 * 16<sup>1</sup> + 13 * 16<sup>0</sup>
C. 6 * 16<sup>2</sup> + 11 * 16<sup>1</sup> + 14 * 16<sup>0</sup>
D. 6 * 16<sup>2</sup> + 14 * 16<sup>1</sup> + 15 * 16<sup>0</sup>
Answer» B. 6 * 16<sup>2</sup> + 12 * 16<sup>1</sup> + 13 * 16<sup>0</sup>
Discussion
2244.

The largest two digit hexadecimal number is _____

A. (FE)16
B. (FD)16
C. (FF)16
D. (EF)16
Answer» D. (EF)16
Discussion
2245.

The decimal equivalent of the octal number (645)8 is ______

A. (450)10
B. (451)10
C. (421)10
D. (501)10
Answer» D. (501)10
Discussion
2246.

An important drawback of binary system is

A. It requires very large string of 1’s and 0’s to represent a decimal number
B. It requires sparingly small string of 1’s and 0’s to represent a decimal number
C. It requires large string of 1’s and small string of 0’s to represent a decimal number
D. None of the Mentioned
Answer» B. It requires sparingly small string of 1‚Äö√Ñ√∂‚àö√ë‚àö¬•s and 0‚Äö√Ñ√∂‚àö√ë‚àö¬•s to represent a decimal number
Discussion
2247.

The decimal equivalent of the binary number (1011.011)2 is

A. (11.375)10
B. (10.123)10
C. (11.175)10
D. (9.23)10
Answer» B. (10.123)10
Discussion
2248.

The representation of octal number (532.2)8 in decimal is :

A. (346.25)10
B. (532.864)10
C. (340.67)10
D. (531.668)10
Answer» B. (532.864)10
Discussion
2249.

If the decimal number is a fraction then its binary equivalent is obtained by ________ the number continuously by 2.

A. Dividing
B. Multiplying
C. Adding
D. Subtracting
Answer» C. Adding
Discussion
2250.

The parameter through which 16 distinct values can be represented is known as:

A. Bit
B. Byte
C. Nibble
D. Word
Answer» D. Word
Discussion