Jack and Tree Height

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?




Similar Riddles

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

Asked by Neha on 19 Sep 2025


If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Asked by Neha on 07 Mar 2025

If eleven plus two equals one, what does nine plus five equal?

Asked by Neha on 28 Mar 2022


Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Asked by Neha on 22 Jan 2024

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

Asked by Neha on 07 Jul 2021

What number when divided in half becomes zero?

Asked by Neha on 20 Jul 2024


What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Asked by Neha on 26 Sep 2021

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Asked by Neha on 04 Apr 2024

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Connect the Stars

Asked by Neha on 17 May 2021


Can you solve below mathematical equation?

2^1234 - 2^1233

Asked by Neha on 26 Jan 2024

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In the 1920s, people feared that crossword puzzles would contribute to illiteracy.