[B].
[C].
[D].
Answer: Option C
Explanation:
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
A. 10%
B. 10.5%
C. 12%
D. None of these
Explanation:
Difference in C.I. and S.I for 2 years = (696.30 – 660) = Rs. 36.30.
S.I for one year = Rs. 330.
S.I. on Rs. 330 for 1 year = Rs. 36.30
Rate = (100 * 36.30)/(330 * 1) = 11%
[B].
[C].
[D].
Answer: Option C
Explanation:
Go on multiplying 2 and adding 1 to get the next number.
So, 39 is wrong.
[B].
[C].
[D].
Answer: Option A
Explanation:
Let the rate be R% p.a.
| Then, 1200 x | 1 + | R | 2 | = 1348.32 | ||
| 100 |
| 1 + | R | 2 | = | 134832 | = | 11236 | |||
| 100 | 120000 | 10000 |
| 1 + | R | 2 | = | 106 | 2 | |||||
| 100 | 100 |
| 1 + | R | = | 106 |
| 100 | 100 |
R = 6%
[B].
[C].
[D].
Answer: Option D
Explanation:
Let the given numbers be A, B, C, D, E, F, G.
Then, A, A x 1 + 1, B x 2 + 2, C x 3 + 3, D x 4 + 4, E x 5 + 5, F x 6 + 6 are the required numbers.
Clearly, 228 is wrong.
[B].
[C].
[D].
Answer: Option C
Explanation:
| 107 x 107 + 93 x 93 | = (107)2 + (93)2 |
| = (100 + 7)2 + (100 – 7)2 | |
| = 2 x [(100)2 + 72] [Ref: (a + b)2 + (a – b)2 = 2(a2 + b2)] | |
| = 20098 |
[B].
[C].
| 7 | 1 | % |
| 8 |
[D].
Answer: Option D
Explanation:
Let the rate be R% p.a.
| Then, | 5000 x R x 2 | + | 3000 x R x 4 | = 2200. | ||||
| 100 | 100 |
100R + 120R = 2200
| R = | 2200 | = 10. | ||
| 220 |
Rate = 10%.