It’s my wife’s birthday tomorrow. I won’t say her age here, but

**if she lives to 100, how many birthday candles will she have blown out?**It seems two readers have beat me to the punch. Well played. They’ve both assumed she has one candle on her first birthday, two on her second, three on her third, etc. By making two columns of numbers as

*A*has done, you can see that each pair of numbers on a line sums to 101:1 +100 = 101

2 + 99 = 101

[...]

2 + 99 = 101

[...]

49 + 52 = 101

50 + 51 = 101

50 + 51 = 101

We can then multiply by 50 rows to get the answer,

50 x 101 = 5,050 candles

5,050

ReplyDeleteI read a quick way to solve these somewhere:

ReplyDelete1 + 100 = 101

2 = 99 = 101

[...]

50 + 51 = 101

So 50 x 101 = 5,050.

Happy Birthday, Anna!!!!

ReplyDelete