Number system
Total Questions: 23
1) The sum of five consecutive even numbers of set-A is 280. What is the sum of different set of five consecutive numbers whose lowest number is 71 less than double the lowest number of set-A?
- A: 182
- B: 165
- C: 172
- D: 175
2) 2ab5 is a four-digit number divisible by 25. If the number formed from the two digits ab is a multiple of 13, then ab =?
- A: 10
- B: 25
- C: 52
- D: 65
3) The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6,
- A: 3
- B: 13
- C: 23
- D: 33
4) A number when divided by 765 leaves a remainder 42. What will be the remainder if the number is divided by 17?
- A: 8
- B: 5
- C: 7
- D: 6
5) When ‘n’ is divided by 5 the remainder is 2. What is the remainder when n^2 is divided by 5?
- A: 2
- B: 3
- C: 1
- D: 4
6) The sum of five consecutive numbers is 270. What is the sum of the second and the fifth number?
- A: 108
- B: 107
- C: 110
- D: None
7) A number is multiplied by 9 and 9 is added to the product. If the resulting number is divisible by 17, the smallest of such number is
- A: 9
- B: 16
- C: 17
- D: 21
8) When a number is divided by seven, it has a remainder of 2. When it is divided by 6, it has a remainder of 3. What is the number?
- A: 16
- B: 44
- C: 38
- D: 51
9) Find the unit digit in the product of (268 x 539 × 826 × 102).
- A: 5
- B: 3
- C: 4
- D: 2
10) The least square number which is exactly divisible by each of these number 6,9,15 and 20 is?
- A: 400
- B: 900
- C: 961
- D: 1024
11) In a division sum, the divisor is ten times the quotient and five times the remainder. If the remainder is 46, then find the dividend.
- A: 5388
- B: 5343
- C: 5336
- D: 5391
12) If sum of integers from 101 to 200, inclusive is subtracted from the sum of integers from 201 to 300 inclusive then the result is
- B: 100
- C: 1000
- D: 100 00
13) If a and b are two numbers such that ab = 0, then [Aggarwal – 32]
- A: a = 0 and b=0
- B: a=0 or b=0 or both
- C: a = 0 and b#0
- D: b= 0 and a #0
14) If (n-1) is an odd number, what are the two other odd numbers nearest to it?[Aggarwal – 29]
- A: n, n-1
- B: n, n-2
- C: n-3, n+1
- D: n-3, n+ 5
15) What is the number of prime factors contained in the product 30^7 x 22^5 x 34^11 [Aggarwal-164]
- A: 49
- B: 51
- C: 52
- D: 53
16) If the largest three-digit number is subtracted from the smallest five-digit number, then the remainder is [Aggarwal – 7]
- A: 1
- B: 9000
- C: 9001
- D: 90001
17) P and Q are two positive integers such that PQ-64. Which of the following cannot be the value of P + Q? [Aggarwal – ?]
- A: 16
- B: 20
- C: 35
- D: 65
18) The number of prime factors in the expression 6^10, 7^17, 11^27 is equal to [Aggarwal-163]
- A: 54
- B: 64
- C: 71
- D: 81
19) 3. Which of the following is a prime number?
- A: 143
- B: 289
- C: 117
- D: 359
20) 4. The smallest value of natural number n, for which 2n + 1 is not a prime number, is [Aggarwal-70]
- A: 3
- B: 4
- C: 5
- D: None
21) Which of the following is a prime number?
- A: 20
- B: 19
- C: 21
- D: 22
22) Which is not a prime number? (?) [Aggarwal – 66]+[Aggarwal-357]
- A: 13
- B: 19
- C: 21
- D: 17
23) Which of the following number is a prime Number?
- A: B)
- B: C)
- C: D)
Time: 60s |
Correct: 0 |
Wrong: 0