can you guess what it is?

Algebra Level 1

Juan and Pedro are siblings.
When Juan was two years old,
Pedro's age was half the age of Juan.
How old is Pedro now that Juan is 100 years old?

50 99 200 150

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5 solutions

Chester Mercado
Feb 8, 2016

when Juan was 2, Pedro was 1, therefore he is 1 year older than Pedro, so that when Juan is 100 Pedro is 99

Mohammad Khaza
Aug 4, 2017

Juan was 2 and Pedro was 1.

so, if Juan is 100 Pedro is 99

Munem Shahriar
Jun 23, 2017

When Juan was 2 2 years old Pedro is 2 × 2 \times 1 2 \dfrac{1}{2} = 1 = 1 years old

So Pedro is 1 1 year younger than Juan

when Juan is 100 100 years old Pedro is 100 1 = 99 100 - 1 = 99 years old

When Juan was 2 years old Pedro was 1 2 \frac{1}{2} Of Juan's age or 1 year old

so:

2-1=1(difference between Juan's and Pedro's age)

so when Juan is 100

100 - 1 = 99

The difference is always 1 1 .

Answer: 99 99

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