PIMSO 2022 - Mathematics - Kindergarten - National Round

Below is the figure of a portion of a rectangular plant box that is further divided into smaller plant boxes. The dividers are represented in red. If there are a total of 56 dividers, how many smaller plant boxes are there in total?

How many composite numbers are there between 1 and 20?

What is the sum of the even numbers between 1 and 12?

What is the largest whole number that can be formed from the digits 3,9,0,5?

How many 5s should you add together to obtain 45?

Your teacher gave your class gummy bears and asked each group to get 36 pieces each. Your group unintentionally scooped 53 pieces. How many pieces should your group give back?

A clock shows 3:15 P.M. If the minute hand points in the direction of south, then in which direction is the hour hand pointing?

At the end of a meeting, four students shake hands with each other once. How many handshakes will be there altogether?

It is Leta’s birthday today. She is 5 years older than Leo. If you add their ages the sum is 27. How old is Leta?

Find the odd man out

What is next in the series?

3A, 4B, 5C, ?

If [Monday → Saturday] and [Wednesday → Monday], then [Thursday → ____?____ ]

Find $L$ if $L-35=65$.

What is 7 added to itself 11 times, that is, $7+7+7+7+7+7+7+7+7+7+7$?

Simplify $9+9-9+9-9+9-9+9-9+9-9+9-9$.

Simplify: $127+126+125+124+123+77+76+75+74+73$.

Simplify: $200-37-24-36-3$.

Simplify: $31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49$.

How many squares are there in the figure below?

How many sides does a pentagon have?