Question

Given four weights that weigh 500 g, 1 kg, 2 kg and 5 kg. If Vimal places 7 kg of flour on one pan of the balance, then the weights he has to place on the other pan so that the pans balance are _______.

• A. 1 kg and 5 kg
• B. 1 kg and 2 kg
• C. 2 kg and 5 kg
• D. 500 g and 2 kg

Answer 1

The correct option is C 2 kg and 5 kg

One pan of the balance has 7 kg of flour in it.
For the pans to balance, the total weight of the stones on the other pan should be equal to 7 kg.

Note that
1 kg + 5 kg = 6 kg,
1 kg + 2 kg = 3 kg,
2 kg + 5 kg = 7 kg and
500 g + 2 kg = 2 kg 500 g.

So, the required weights are 2 kg and 5 kg.