Maths (7B) Nick and Tesla's High voltage danger lab

Nick and Tesla are working on a high-voltage experiment. On the first day, they charged their battery with 220 units of power. But due to a short circuit, they lost 90 units of power the next day. On the third day, they recharged it with an additional 150 units. How many units of power does their battery have now?

• 280 units

• 190 units

• 460 units

• 150 units

Tags

BB - Operations on integers

Nick and Tesla have bought 256 led lights for their next experiment. Can they make sets of 8 lights each without any remaining?

• Yes

• No

Tags

BB - Factors and multiples

Tesla is using 3/7 of a metre of the wire available for her gadget, and Nick is using 4/7​ of a metre of the wire for his robot. How much wire are they using together?

• 1 M

• 7 M

• 1.5 M

• 2.5 M

Tags

BB - Rational Numbers

In San Francisco, the temperature was 2°C at 8pm and dropped to -3°C by midnight. By how many degrees did the temperature fall?

• 6°C

• 5°C

• 3°C

• 2°C

Tags

B - Operations on integers

Uncle Newt had 96 cans of soda. If he wants to drink equal number of soda cans every day, how many cans of soda should he drink every day? Choose from the below options.

• 3

• 5

• 10

• 7

Tags

B - Factors and multiples

The rocket was supposed to reach till 5/8 of a kilometre. But due to heavy winds, it reached only 3/7 of a kilometre. What was the loss in kilometres due to the winds?

• 11/56 Km

• 9/56 Km

• 13/56 Km

• 31/56 Km

Tags

B - Rational Numbers

Nick is building a square circuit board. The side length of the board is 9 metres. What is the area of the circuit board?

(Hint : area = side²)

• 81

• 18

• 27

• 91

Tags

B - Indices

Who performed the highest number of experiments in the months of March & May?

• Nick, Tesla

• Tesla, Nick

• Nick, Nick

Tags

B - Joint bar graph

Nick and Tesla are running 3 different experiments, each requiring 2 batteries of 50 units and 40 units of power respectively. They repeat each experiment 2 times. How will you express the amount of power needed mathematically?

• 2 x (50 + 40) x 3

• 2 x 50 + 40 x 3

• 3 x 50 + 40 x 2

• (3 x 40) + (50 x2)

Tags

P - Operations on integers

Nick and Tesla have 84 m of copper wire and 126 m of aluminium wire. They need to cut both types of wire into multiple pieces of equal length for their experiment. What is the maximum length of each piece they can cut?

• 21 m

• 14 m

• 42 m

• 7 m

Tags

P - Factors and multiples