Why isn't the answer to TMUA-P1-MNUM-025 shown upfront?

The options are lettered without marking the correct one so you attempt TMUA-P1-MNUM-025 first — TMUA questions reward spotting the trap before you check the worked solution below.

Do I need a calculator for TMUA-P1-MNUM-025?

No — calculators are banned in the TMUA. TMUA-P1-MNUM-025 is set for a no-calculator target of about 120 seconds; the worked solution shows the fastest by-hand route.

Which TMUA specification point is TMUA-P1-MNUM-025?

TMUA-P1-MNUM-025 is Paper P1 · Number (specification code M-Num), level 1. Drill more of the same topic from this page.

TMUA-P1-MNUM-025 — Paper P1 · Number · Level 1

P1M-NumLevel 1~120s target

Spec: M-Num · No calculator · ~120s

Write the ratio

15:25

in its simplest form.

Options

$5:3$
$3:5$
$1:2$
$3:2$
$5:5$

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: mratio-simplify, ratio-division. Name the trap first, work the stem by hand, then open the solution below.

Show solution

Divide both parts by

5

15:25 = 3:5

.
Trap:

5:3

divides correctly but writes the parts in the wrong order.

Keep practising

Same topic · same level
P1M-NumLevel 1
TMUA-P1-MNUM-001
What is the highest common factor (HCF) of 36 and 54?
Number
Open TMUA-P1-MNUM-001 →
Same trap: ratio-division
P1M-NumLevel 1
TMUA-P1-MNUM-004
Share 45 in the ratio 2:3. What is the smaller share?
Number
Open TMUA-P1-MNUM-004 →
Step up a 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 →

Browse more

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Keep practising

Same topic · same level

P1M-NumLevel 1

TMUA-P1-MNUM-001

What is the highest common factor (HCF) of 36 and 54?

Number

Open TMUA-P1-MNUM-001 →

Same trap: ratio-division

P1M-NumLevel 1

TMUA-P1-MNUM-004

Share 45 in the ratio 2:3. What is the smaller share?

Number

Open TMUA-P1-MNUM-004 →

Step up a 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 →

TMUA-P1-MNUM-025 — Paper P1 · Number · Level 1

Options

Keep practising

Master Number

TMUA-P1-MNUM-025 — Paper P1 · Number · Level 1

Options

Keep practising

Master Number