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- Question
What will come in place of the question mark (?) in the following number series? 3240, 540, 108, 27, ?, 4.5
Options- A. 7
- B. 10
- C. 9
- D. 8
- Correct Answer
- 9
ExplanationAns.
540 = 3240/6
108 = 540/5
27 = 108/4
? = 27/3, i.e. ? = 9 - 1. There are four consecutive even integers. Sum of the reciprocals of the first two number is (11/60). Find the reciprocal of third largest number of the series.
Options- A. 1/12
- B. 2/14
- C. 1/14
- D. 2/13 Discuss
- 2. There is a three digit number. The digit at the tenth place is 3. If the place of all the digits are replaced with each other symmetrically about the tens position,then the new number obtained is 396 more than the original three digit number. The sum of the digits at unit & hundredth place is 14. Find out the original number?
Options- A. 513
- B. 539
- C. 439
- D. 613 Discuss
- 3. Direction: What should come in the place of question mark (?) in the following number series? 24, 25, ?, 41, -8, 73
Options- A. 13
- B. 16
- C. 25
- D. 43 Discuss
- 4. Direction: What should come in the place of question mark (?) in the following number series? 7, 10, 16, 28, ?, 100
Options- A. 34
- B. 40
- C. 52
- D. 60 Discuss
- 5. Direction: What should come in the place of question mark (?) in the following number series? 3, 4, 10, 33, 136, ?
Options- A. 150
- B. 298
- C. 463
- D. 572 Discuss
- 6. What will come in place of the question mark in the series below? 3, 5, 15, 45, 113, ?
Options- A. 250
- B. 243
- C. 247
- D. 261 Discuss
- 7. What will come in place of the question mark in the series below? 2, 17, 89, 359, 1079, ?
Options- A. 2137
- B. 2121
- C. 2377
- D. 2159 Discuss
- 8. Which of the following will yield a reclining decimal?
Options- A. 6024
- B. 3024
- C. 9024
- D. 12024 Discuss
- 9. How many numbers are there from 300 to 650 which are completely divisible by both 5 and 7?
Options- A. 8
- B. 9
- C. 10
- D. 12 Discuss
- 10. Find two natural numbers whose sum is 85 andtheleast common multiple is 102.
Options- A. 30 & 55
- B. 17 & 68
- C. 35& 55
- D. 51 & 34 Discuss
Numbers problems
Search Results
Correct Answer: 1/14
Explanation:
Ans. C.
Let 4 consecutive even numbers are x, x+ 2, x+ 4, x+ 6
According to the question -
1/x + 1/x+2 = 11/60
x+2+x/ x(x+2) = 11/60
2(x+1)/x^2 + 2x = 11/60
120x + 120 = 11x 2 + 22x
11x 2 - 98x ? 120 = 0
So ,
X = -24/22 , 10
X = -12/11 , 10
So, the numbers will be 10,12,14,16.
Hence,
Third largest number = 14
Reciprocal of third number = 1/14
Correct Answer: 539
Explanation:
Ans.
Let digit = xyz
Given y = 3
According to the question = (100z+10y+x) - (100x+10y+z) = 396x99z-99x = 396
Z-x = 4
Also, Z+ x = 14
Solving (i) & (ii)
Z = 9 , x= 5
The original number is 539
Correct Answer: 16
Explanation:
The pattern followed is
Correct Answer: 52
Explanation:
The pattern followed is +3 , +6 , +12 , +24 , +48
Correct Answer:
Explanation:
The pattern followed is *1 + 1, *2 +2 , *3 + 3 , *4 + 4 , *5 + 5
Correct Answer: 243
Explanation:
Ans.
5 = 3 + (13 + 1)
15 = 5 + (23 + 2)
45 = 15 + (33 + 3)
113 = 45 + (43 + 4)
? = 113 + (53 + 5), i.e. ? = 243
Correct Answer: 2159
Explanation:
Ans.
17 = 2 x 6 + 5
89 = 17 x 5 + 4
359 = 89 x 4 + 3
1079 = 359 x 3 + 2
? = 1079 x 2 + 1, i.e. ? = 2159
Correct Answer: 9024
Correct Answer: 10
Correct Answer: 51 & 34
Explanation:
Let a + b = 85?b = 85 ?a
LCM(a,b) =102?ab = 102
k?a(85 ?a) = 102k, where k is a natural number.
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