51.

If 35 men finish a piece of work in 8 days, then the number of men who can do the same work in 10 days is

• 38

• 28

• 19

• 19

A shopkeeper gives two successive discounts of 7% each on marked price of ₹ 20,000/- of an article. The selling price of the article is

• ₹ 12,798

• ₹ 19,278

• ₹ 18,927

• ₹ 18,927

The present ages of A and B are in the ratio 3 : 4. Ten years ago, this ratio was 4 : 7. The present age of A and B are respectively:

• 18 years, 24 years

• 21 years, 28 years

• 24 years, 32 years

• 24 years, 32 years

Sapna purchased a cycle for ₹ 1,000/- and sold it for ₹ 1,200/-. Her gain in percentage is

• 20%

• 10%

• 12%

• 12%

In 2001, the price of a building was 80% of its original price. In 2002, the price was 60% of its original price. By what percent did the price decrease?

• 15%

• 20%

• 25%

• 25%

Sound travels 330 m in a second. When the sound follows the flash of lightning after 10 sec, the thunder cloud will be at a distance of

• 1300 m

• 2000 m

• 3650 m

• 3650 m

If  then the value of a³ + b³ - 2 is

• 0

• -2

• -1

• -1

The amount to be paid, when principal  = ₹ 2,000/-, Rate of simple interest (R) = 5%, T = 2 years, is

• ₹ 3,200/-
• ₹ 2,400/-
• ₹ 2,200/-
• ₹ 2,200/-

If x + y = 1 + xy, then x³ + y³ - x³y³ is equal to

• 0

• 1

• -1

• -1

The perimeter of two similar triangles ΔABC and ΔPQR are 60 cm and 36 cm respectively. If PQ = 18 cm, then AB is

• 20 cm

• 24 cm

• 36 cm

• 36 cm