Ganit Challenge_Class 10(Round 1- Quiz)

What is the next number in the sequence: 2, 9, 28, 65, __?

• 88

• 96

• 126

• 116

A and B can complete a work in 30 days and 20 days respectively. If they work together, in how many days can they complete the work?

• 50

• 15

• 10

• 12

A number is increased by 20% and then decreased by 20%. What is the net percentage change?

• 4% decrease

• 4% increase

• No Change

• 20% decrease

Which number will come in place of question mark?

• 6

• 5

• 4

• 3

A train travels 88 km in 1 hour and 20 minutes. What is its speed in km/h?

• 50

• 60

• 64

• 66

A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:

• 145°

• 150°

• 155°

• 160°

The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

• 40%

• 42%

• 44%

• 46%

A metallic sheet is of rectangular shape with dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m³) is:

• 4830

• 5120

• 6420

• 8960

A man has Rs.480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

• 45

• 60

• 75

• 90

If a - b = 3 and a² + b² = 29, find the value of ab.

• 10

• 12

• 15

• 18