Day 34 of 60 · Mon 2 Nov · Daily workbook · CAT in 27 days

Day 34: Averages + Arrangements Set + Science RC

Day 34 of the free ThinkCAT 60-day CAT challenge: 5 averages questions and 3 spaced-review QA questions, a full arrangements DILR set (4 questions), a science RC passage (4 questions), plus para jumbles and odd one out. Every question is a real CAT PYQ.

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

Concept card

Averages

Core formulas

Total = Average × Count; convert to totals first
Combined average = (n₁A₁ + n₂A₂) ÷ (n₁ + n₂)
Replace x by y among n items: the average moves by (y − x)/n
Equally spaced values: average = middle term = (first + last)/2

60-second shortcut · Deviation method

47, 52, 49, 58, 54 with base 50: deviations add to +10, so the average is 50 + 10/5 = 52.

Trap box

Looks like: 60 (20 people) and 80 (30 people) average 70Actually: 3,600 ÷ 50 = 72: weight by count
Looks like: Average of 10 is 40; add 62: 462 ÷ 10Actually: Count is now 11: 462 ÷ 11 = 42

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

What's in Day 34

QA: Averages (5) + 3 spaced-review questions
DILR: Arrangements set, 4 questions
RC: Science passage
VA: Para Jumbles, Odd One Out

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...