Why isn't the answer to TMUA-P1-MNUM-017 shown upfront?

The options are lettered without marking the correct one so you attempt TMUA-P1-MNUM-017 first — TMUA questions reward spotting the trap before you check the worked solution below.

Do I need a calculator for TMUA-P1-MNUM-017?

No — calculators are banned in the TMUA. TMUA-P1-MNUM-017 is set for a no-calculator target of about 150 seconds; the worked solution shows the fastest by-hand route.

Which TMUA specification point is TMUA-P1-MNUM-017?

TMUA-P1-MNUM-017 is Paper P1 · Number (specification code M-Num), level 2. Drill more of the same topic from this page.

TMUA-P1-MNUM-017 — Paper P1 · Number · Level 2

P1M-NumLevel 2~150s target

Spec: M-Num · No calculator · ~150s

The simultaneous equations

2x + y = 11

and

x - y = 1

hold. What is the value of

y

Options

Letters only — the answer key is hidden. Work it out, then check the solution below.

Hint (check trope)

No written hint yet — check the trope: malg-simultaneous, elimination. Name the trap first, work the stem by hand, then open the solution below.

Show solution

Add the equations to eliminate

y

3x = 12

, so

x = 4

. Then

4 - y = 1

gives

y = 3

.
Trap:

4

answers with

x

instead of the requested

y

Keep practising

Same topic · same level
P1M-NumLevel 2
TMUA-P1-MNUM-005
What is the lowest common multiple (LCM) of 12, 18 and 20?
Number
Open TMUA-P1-MNUM-005 →
Same trap: malg-simultaneous
P1M-NumLevel 3
TMUA-P1-MNUM-023
The simultaneous equations 3x + 2y = 20 and 5x - y = 3 hold. What is the value of x + y?
Number
Open TMUA-P1-MNUM-023 →
Step up a level
P1M-NumLevel 3
TMUA-P1-MNUM-011
4000 is invested. It grows by 5\% in year one, then falls by 5\% in year two. What is its final value?
Number
Open TMUA-P1-MNUM-011 →

Browse more

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Keep practising

Same topic · same level

P1M-NumLevel 2

TMUA-P1-MNUM-005

What is the lowest common multiple (LCM) of 12, 18 and 20?

Number

Open TMUA-P1-MNUM-005 →

Same trap: malg-simultaneous

P1M-NumLevel 3

TMUA-P1-MNUM-023

The simultaneous equations 3x + 2y = 20 and 5x - y = 3 hold. What is the value of x + y?

Number

Open TMUA-P1-MNUM-023 →

Step up a level

P1M-NumLevel 3

TMUA-P1-MNUM-011

4000 is invested. It grows by 5\% in year one, then falls by 5\% in year two. What is its final value?

Number

Open TMUA-P1-MNUM-011 →

TMUA-P1-MNUM-017 — Paper P1 · Number · Level 2

Options

Keep practising

Master Number

TMUA-P1-MNUM-017 — Paper P1 · Number · Level 2

Options

Keep practising

Master Number