Directions (Q. 1-5): Which will be the next number in the following number series?
1. 5 26 165 1332 13335 ?
1) 143602
2) 124680
3) 180056
4) 173004
5) 160038
2. 1320 720 336 120 24 ?
1) 12
2) 8
3) 4
4) 2
5) 0
3. 8 47 142 317 596 ?
1) 1003 2) 987
3) 961
4) 942
5) 902
4. 1 10 27 52 85 ?
1) 118
2) 122
3) 126
4) 130
5) 136
5. 1 54 375 1372 3645 ?
1) 6434
2) 7986
3) 8154
4) 9263
5) 9626
6. Mohan purchases 20 kg of sugar at `9.50 per kg and 30 kg of sugar at `9 per kg. At what price per kg should he sell the mixture in order to gain 40%?
1) `12.48
2) `12.64
3) `12.72
4) `12.88
5) `12.96
7. The ages of Ravi and Rohan are in the ratio of 1 : 3. After 12 years the ratio of their ages will be 5 : 11. What is the difference between their ages?
1) 24 years
2) 28 years
3) 32 years
4) 36 years
5) 40 years
8. What will be the percentage profit after selling an article at a certain price if there is a loss of 25% when the article is sold at 1/3 of this selling price?
1) 50%
2) 75%
3) 37.5%
4) 87.5%
5) 125%
9. A person bought a chair at 35% discount on the listed price. Had he not got the discount, he would have paid `112 extra. At what price did he buy the chair?
1) `208
2) `224
3) `240
4) `248
5) `280
10. The salary of an employee increases consistently by 20% every year. If his present salary is `11500, then what will be his salary after three years?
1) `18548
2) `18816
3) `19264
4) `19872
5) `20108
1. (5); The series is ×4 + 6, ×6 + 9, ×8 + 12, ...
2. (5); The series is 11^3 – 11, 9^3 – 9, 7^3 – 9, ...
3. (1); The series is 3^2 × 1 – 1, 5^2 × 2 – 3, 7^2 × 3 – 5, 9^2 × 4 – 7, ...
4. (3); The series is 1 × 2 – 1, 3 × 4 – 2, 5 × 6 – 3, 7 × 8 – 4, 9 × 10 – 5, ...
5. (2); The series is 1 × 1^3, 2 × 3^3, 3 x 5^3, 4 × 7^3, 5 × 9^3, ...
6. (4);
CP = 20 × 9.5 + 30 × 9 = 190 + 270 = 460
SP = 460 × 140 / 100 = 644
Now, price per kg = 644 / 50 = `12.88
7. (4); The age of Ravi and Rohan
Ravi / Rohan = 1 / 3
We can right Ravi / Rohan = 1 * 3 / 3 * 3 = 3 / 9
After 12 years
Ravi / Rohan = 5 / 11
Age Different unit is same so
2 unit = 12
1 unit = 6
Age different ratio is 6 then
6 unit = 6 * 6 = 36
8. (5);
9. (1); 35 % = 112
Then 1% = 112 / 35 = 16 / 5
100% = 16 * 100 / 5 = 320
The listed price = 320
he buy the chair price = 320 - 112 =208
10. (4); Reqd answer
= 11500 × 100 / 120 × 100 / 120 × 100 / 120 = `19872
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