operations on numbers (6.papers)

hcf and lcm (5.papers)

averages (8.papers)

problems on ages (9.papers)

percentage (4.papers)

profit and loss (4.papers)

ratio and proportion (5.papers)

chain rule (5.papers)

time and work (4.papers)

pipes and cisterns (5.papers)

time and distance (5.papers)

problems on trains (8.papers)

boats and streams (7.papers)

partnership (6.papers)

simple interest (4.papers)

compound interest (2.papers)

permutation and combination (3.papers)

clock (2.papers)

calendar (3.papers)

1

If the sum of two numbers is 72 and the H.C.F. and L.C.M. of these numbers are 6 and 60 respectively, then the sum of the reciprocals of the numbers is equal to:

13/20

9/20

10/20

1/5

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4

The least number, which when divided by 16, 20 and 48 leaves in each case a remainder of 11 is:

251

336

444

548

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5

The H.C.F. of two numbers is 23 and their L.C.M. is 3250. If one of the numbers is 325, then the other is:

230

283

310

318

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8

231 can be expressed as a product of primes as:

3 * 7 * 11

2 * 2 * 2 * 3 * 7

3 * 3 * 3 * 7

2 * 3 * 3 * 3 * 7

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11

The least number which when divided by 3, 8 , 11 and 15 leaves a remainder 2, but when divided by 2 leaves no remainder, is:

677

1322

2523

3363

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12

P, Q and R start at the same time in the same direction to run around a circular stadium. P completes a round in 126 secs, Q in 154 secs and R in 99 secs, all starting at the same point. After what time will they again at the starting point ?

23 min 6 sec

42 min 36 sec

45 min

46 min 12 sec

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17

The G.C.D. of two numbers is 31 and the other two factors of their L.C.M. are 11 and 15. The larger of the two numbers is:

276

299

322

465

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18

The least number which when decreased by 9 is divisible by each one of 16, 24, 36 and 54, is

441

859

869

4320

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19

The greatest possible length which can be used to measure exactly the lengths 3 m 50 cm, 1 m 85 cm, 6 m 45 cm is:

5 cm

25 cm

35 cm

42 cm

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