BBB 2023 - Grade 3 - Preliminary Round

Find the value of $4812-2677+1998$.

The age of Jack 6 years ago is equal to the age of Thomas 5 years ago. Given Jack is 26 years old now, how old is Thomas now?

Find the value of $7\times8+8\times8-5\times8$.

How many 2-digit odd numbers with identical digits are there such that the unit digit is smaller than 6?

Find the value of $60:2+60:3+60:5$.

Define the operation symbol $a\odot b=(a-b)\times a$, find the value of $8\odot6$.

Find the value of $13-18+23-11+27$.

Rose and Lisa have 33 stickers altogether. If the number of Rose’s stickers is 9 more than that of Lisa, how many stickers does Lisa have?

Observe the figure below. At least how many square faces can be seen from the right?

An open tap can fill 4 cups of water in 20 seconds. How many cups of water can the tap fill in half of a minute?

Today is Thursday. Which day of the week was it 24 days ago?

Find the value of $2+4+6+8+10+\ldots+28$.

The sum of $X$ and $Y$ is 42. $X$ is 6 times of $Y$. Find the value of $Y$.

There are some horses on the farm. Coby counts and sees that their total number of legs is 24 more than their total number of eyes. How many horses are there in total?

Refer to the figure below, how many squares are there?

Laura had some pens. She bought 6 new pens and gave her friends 9 pens. Then, she threw away 5 old pens and gave half of the remaining pens for donation. Finally, she had 23 pens. How many pens did she have originally?

The lift in Justin’s apartment broke down. It took him 24 seconds to walk up from the 1st storey to the 3rd storey. How many seconds does he need to walk up from the 1st storey to the 7th storey?

Refer to the following figure, how many rectangles with the moon are there?

How many 2-digit odd numbers are there?

Tris and Morgan arrange identical square pieces of paper in 2 different ways below. Given that the perimeter of Tris’s figure is 36cm, find the total perimeter of 2 figures.