Day 15 of 60 · Wed 14 Oct · Daily workbook · CAT in 46 days

Day 15: Mixtures & Alligation + Grids & Matching Set + Philosophy RC

Day 15 of the free ThinkCAT 60-day CAT challenge: 5 mixtures & alligation questions and 3 spaced-review QA questions, a full grids & matching DILR set (4 questions), a philosophy RC passage (4 questions), plus para summary and sentence placement. Every question is a real CAT PYQ.

QA · 8
DILR · 4
VARC · 6
40 minutes
Real CAT questions

Concept card

Mixtures & Alligation

Core formulas

Alligation: cheaper : dearer = (D − M) : (M − C)
Draw x from V and refill, n times: pure left = V(1 − x/V)ⁿ
Mixing solutions: alligate on the % of the same ingredient
Selling price given? Strip the profit first, then alligate on cost

60-second shortcut · Cross the differences

20% and 50% acid to make 30%: (50 − 30) : (30 − 20) = 2 : 1. The one nearer the mean gets the bigger share.

Trap box

Looks like: 20% and 50% make 30% in 20 : 50Actually: (50 − 30) : (30 − 20) = 2 : 1
Looks like: Two 10 L swaps from 100 L milk leave 80 LActually: 100 × 0.9² = 81 L

From the free Arithmetic Formula + Trap Book (PDF).

What's in Day 15

QA: Mixtures & Alligation (5) + 3 spaced-review questions
DILR: Grids & Matching set, 4 questions
RC: Philosophy passage
VA: Para Summary, Sentence Placement

Year, slot and question number for each question appear with the answer key after you submit.

Get the workbook PDF every morning

The day’s PDF is posted at 6:00 AM in the ThinkCAT WhatsApp group, with the toughest question explained every evening.

Join on WhatsApp

Loading ThinkCAT...