SEAMO X 2021 — Paper A — Grade 1–2

How many cubes are in the figure, including hidden supporting cubes?

Find the missing number: $10,20,30,\square,80,130$.

Distinct digits $A,B,C,D,E$ satisfy $C=2E$ and $D+\overline{CD}+\overline{BCD}+\overline{ABCD}=\overline{EEEE}$. Find $E$.

Using the digits $3,6,9$, how many three-digit numbers greater than $500$ can be formed?

If $16$ July is Wednesday, what weekday is $23$ June?

Find $2+4+6+8+\cdots+20$.

Child tickets cost $5$ dollars and adult tickets $8$. Mrs Tan spends $99$ on $18$ tickets. How many adult tickets are there?

How many chicks balance a dog?

Draw the next pattern.

Pete is $23$rd from the back of a queue, with $9$ students in front of him. How many students are there altogether?

Find the mass of a banana in grams.

Shandy climbs from floor $1$ to floor $3$ in $4$ minutes. At the same speed, how many minutes from floor $1$ to floor $9$?

A tank contains $42\text{ L}$ of water and leaks $3\text{ L}$ each minute through a hole. How many minutes until it is empty?

Aloysius is $45$ and his three sons are $15,11,7$. After how many years will his age equal the sum of theirs?

Find the missing number in the third triangle.

Suzie checks clocks at regular intervals on Saturday afternoon. Find Figure $4$’s time in HH:MM PM format.

A circled plus and a dotted square sum to $77$. Circled plus minus dotted square is $27$. Find the dotted square.

When writing the integers from $301$ to $400$, how many times does digit $0$ appear?

How many dots are in Figure $7$?

Figure $1$ places sixteen triangles in eight border squares, with five triangles on each outer side. Fill Figure $2$ with twelve triangles in total, still five on each side.