Which of these numbers is a factor of 40?
Which of these numbers is a multiple of 6?
Which of these numbers is NOT a prime number?
2
31
9
How can 35 also be written?
\[3 \times 3 \times 3 \times 3 \times 3\]
\[3 \times 5\]
\[5 \times 5 \times 5\]
What is \(\sqrt{64}\)?
32
8
6.4
Write 12 as the product of its prime factors.
\[2 \times 6\]
2, 2, 3
\[2 \times 2 \times 3\]
Write 90 as the product of its prime factors.
\[2 \times 9 \times 5\]
\[2 \times 3 \times 3 \times 5\]
2, 3 and 5
Calculate the HCF of 12 and 90.
6
180
Calculate the LCM of 12 and 90.
1,080
A boy must take a red tablet every 20 minutes and a blue tablet every 35 minutes. If he takes both tablets at 12pm, what time will he next take both tablets together?
1:05pm
2:20pm
12:55pm