# Check reasonableness of calculations

## Interactive practice questions

Ursula collects beetles. She knows that she has exactly $169$169 of them. Ursula has to move house this week, and must buy storage boxes to transport them.

Which of the following should Ursula buy?

$3$3 boxes that hold $180$180 beetles each.

A

$4$4 boxes that hold $40$40 beetles each.

B

$2$2 boxes that hold $10$10 beetles each.

C

$9$9 boxes that hold $20$20 beetles each.

D

$3$3 boxes that hold $180$180 beetles each.

A

$4$4 boxes that hold $40$40 beetles each.

B

$2$2 boxes that hold $10$10 beetles each.

C

$9$9 boxes that hold $20$20 beetles each.

D
Easy
Less than a minute

Brad and Bill went out one evening. Bill said:

"I have $£18.40$£18.40, which is about $£20$£20. This food stall charges $£9.50$£9.50 for a kebab, which is about $£10$£10. That means I have enough money to pay for both of us to get a kebab."

Which of the following is closest to the sum $33+42+24$33+42+24?

Is the the following sum close to $1000$1000?

$947+826+12$947+826+12