TIMO 2018 Grade 2 Heat Set 4

Given Amy has 3 sisters and 2 brothers, how many child(ren) does Amy’s mother have?

According to the pattern shown below, what is the 27th symbol counting from the left?

After 6 years, Amy will be 13 years old. How old was Amy 4 years ago?

John wrote a 2-digit number on a piece of paper and asked Peter to guess it. Peter asked: “Is the number 89?” John replied: “One of the digits is correct, the position of that digit is also correct.” Peter asked again: “Is the number 17?” John replied: “One of the digits is correct, the position of that digit is wrong.” Peter asked again: “Is the number 75?” John said: “One of the digits is correct, the position of that digit is correct.” What is the number written by John?

According to the pattern below, how many ⊗ is / are there in the 10th Group?

Find the value of $1+3+5+7+9+11+13+15+17+19$.

Find the value of 15×$12+15$×$3-15$×5.

Find the value of $2-4+6-8+10-12+14-16+18$.

What is the number that should be filled in the blank? 123×____=861

If A and B are both 1-digit numbers, what is the value of B? AA + A = B0

Amy has 118 apples and John has 22 apples. How many apple(s) does Amy have to give John to make them have the same number of apples?

4 students have 30 balloons in total and each of them has a different number of balloons. At least how many balloon(s) does the student with the most balloons have?

The numbers below follow the arithmetic sequence, what is the 10th number? 21, 33, 45, 57, 69, …

How many 3-digit even number(s) that are multiples of 5 is / are there?

What is the largest 2-digit number that can be divisible by 3 and 5?

How many square(s) is / are there in the figure below?

A prism has 7 faces, how many vertice(s) does this prism have?

At most how many right angle(s) could a triangle contain?

At least how many squares can be seen if viewing the figure below from top?

At most how many triangles are there by drawing 4 straight lines on a plane?