Identify the correct statements.

1.3 successive discounts of 20%, 25% and 20% are equivalent to a single discount of 65%.

2.The value of (743)^(1/3) x (196)^(1/2) is equal to 98

3.A movement of 180 degree by minute hand results in 30 degree movement of hour hand

4.The total surface area of a solid cube of side 5 cm is 150 cm^2

A1, 2 & 3 only

B2 & 3 only

C1, 3 & 4 only

D2 & 4 only ✓ Correct

Correct answer: (D) 2 & 4 only

Explanation

Statements 2 and 4 are correct.

Statement 1: 0.8 x 0.75 x 0.8 = 0.48, a single discount of 52%, not 65%.

Statement 2: (343)^(1/3) x (196)^(1/2) = 7 x 14 = 98.

Statement 3: a minute hand turn of 180 deg turns the hour hand only 15 deg.

Statement 4: 6 x 5^2 = 150 cm^2 is the cube's surface area.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.