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- Question
- The average of 5 consecutive number is n , if the next two number are also include, the average of 7 number will?
Options- A. Increase by 2
- B. increase by 1
- C. Remains the same
- D. Increase by 1.4
- Correct Answer
- increase by 1
ExplanationSum of 5 consecutive integers
x + ( x +1 ) + ( x +2 ) + ( x + 3 ) + ( x +4 ) = 5n
? 5x + 10 = 5n
? x = ( n ? 2 ) ......(i)
Average of 7 consecutive integers
= [( 5x + 10 ) + ( x + 5 ) + ( x + 6 )] / 7
= 7x + 21 / 7
= x + 3 .....(ii)
from eq. (i) and (ii)
New average = x + 3 = ( n ? 2 + 3 ) = n + 1
So , the new average increases by 1 . - 1. Pick an odd man in the given number series? 4 12 38 87 198
Options- A. 12
- B. 38
- C. 87
- D. 198 Discuss
- 2. What is the area (in sq cm) of a rectangle of perimeter 90 cm and breadth 20 cm?
Options- A. 500
- B. 400
- C. 250
- D. 450 Discuss
- 3. The LCM of 72 and 84 is:
Options- A. 12 × 6 × 7
- B. 6 × 2 × 7
- C. 12 × 7 × 3
- D. 72 × 84 Discuss
- 4. Find the odd man out? 12, 48, 168, 502, 1260
Options- A. 48
- B. 168
- C. 502
- D. 1260 Discuss
- 5. A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 42,500. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1 ?
Options- A. 4 months
- B. 5 months
- C. 6 months
- D. 8 months Discuss
- 6. What is the area (in square units) of the figure enclosed by the graphs of the lines x = -4, x = 2, y = -2 and y = 3?
Options- A. 12
- B. 24
- C. 15
- D. 60 Discuss
- 7. Mark the odd man out in the given number series 24.3, 23.1, 20.7, 17.1, 12.4
Options- A. 12.4
- B. 17.1
- C. 20.7
- D. 23.1 Discuss
- 8. If 4 (A's capital) = 6 (B's capital) = 10 (C's capital), then out of a profit of Rs. 4650, C will receive ____
Options- A. Rs.700
- B. Rs.800
- C. Rs.900
- D. Rs.1000 Discuss
- 9. Which of the following is a reductible fraction?
Options- A. 79/26
- B. 105/112
- C. 41/17
- D. 91/15 Discuss
- 10. 1000, 1012, 988, 1024, 978 Odd man out?
Options- A. 978
- B. 1024
- C. 988
- D. 1012 Discuss
More questions
Correct Answer: 12
Explanation:
The given series follows a pattern that,
Hence, the odd man in the given number series is 12.
Correct Answer: 500
Correct Answer: 12 × 6 × 7
Correct Answer: 502
Explanation:
The given series is 12, 48, 168, 502, 1260
12
12 x 4 = 48
48 x 3.5 = 168
168 x 3 = 504
504 x 2.5 = 1260
Hence, the odd man out in the given series is 502.
Correct Answer: 8 months
Explanation:
Suppose B joined for x months . Then, ( 85000 * 12 )/(42500 * x) = 3. or x = (85000 * 12) / (42500 * 3) = 8.
So, B joined for 8 months.
Correct Answer: 15
Correct Answer: 12.4
Explanation:
The given series 24.3, 23.1, 20.7, 17.1, 12.4 follows a pattern that
24.3
24.3 - 1.2 = 23.1
23.1 - 2.4 = 20.7
20.7 - 3.6 = 17.1
17.1 - 4.8 = 12.3 not 12.4
Hence, the odd man or odd number in the given series is 12.4
Correct Answer: Rs.900
Explanation:
Let 4A = 6B = 1OC = k. Then, A = k/4, B = k/6, and C =k/10 .
A : B :C = k/4 : k/6 : k/10 = 15 : 10 : 6.
Hence, C's share (4650 * 6/31) = Rs, 900.
Correct Answer: 105/112
Correct Answer: 978
Explanation:
The given series is 1000, 1012, 988, 1024, 978
1000
1000 + 12 = 1012
1012 - 24 = 988
988 + 36 = 1024
1024 - 48 = 976 (Not 978)
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