General Aptitude - Numberical Ability - Number System

Question - 1

There are four prime numbers written in ascending order. The product of the first  three is 1001 and that of the last three is 2431. Find the first prime number

  • A 7
  • B 11
  • C 3
  • D 5

Question - 2

What is the remainder when \({ 7 }5^{ 3 }\) is divided by 4?

  • A 1
  • B 1
  • C 3
  • D 2

Question - 3

A man is typing numbers 5 to 700 on his computer. How many times does he press the key of his computer?

  • A 988
  • B 1988
  • C 1888
  • D 1990

Question - 4

What least number must to be added to 15763 so that it is exactly divisible by 18?

  • A 5
  • B 18
  • C 12
  • D 13

Question - 5

What least number must be subtracted from 178669 ao that it is exactly divisible by 36?

  • A 18
  • B 1
  • C 36
  • D 5

Question - 6

Find the numbers of prime factors contained in the product of \({ 23 }^{ 11 }\times { 7 }^{ 4 }\times { 3 }^{ 5 }\)

  • A 25
  • B 17
  • C 30
  • D 20

Question - 7

Two numbers when divided by a certain divisor give remainders 350and 20 respectively and when their sum is divided by the same divisor, the remainder is 1.5 find the divisor.

  • A 30
  • B 40
  • C 35
  • D 45

Question - 8

A certain number when successively dividedby 5 and 7 leaves the remainder, if the same number is divided by 35?

  • A 21
  • B 23
  • C 24
  • D 29

Question - 9

What is the difference between the greatest and th smallest five digit numbers formed using the digits 7,0,3,4 and 2 without repeating the digits?

  • A 65672
  • B 53978
  • C 54672
  • D 65978

Question - 10

A boy had to do a multiplication.instead of taking 35 as one of the multipliers, he took 53. As a result the product went up by 540.What is the new product?

  • A 1590
  • B 1450
  • C 1550
  • D 1420
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