Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 420 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 7 PM
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
12. 12.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
13. 13.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 3 PM (d) 4 PM
14. 14.🧩 Ishaan bought 5 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) not enough info (c) ₹20 (d) ₹25
15. 15.🧩 Aarav is 10 years old. Meera is older than Aarav. How old is Meera? (a) 15 (b) not enough info (c) 12 (d) 11
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Aarav bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹20 (c) ₹40 (d) not enough info
18. 18.🧩 Tara bought 2 kites and a cap for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹118 (d) ₹120
19. 19.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) yes, it is certain (d) no, check more
20. 20.🧩 Tara bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) not enough info (c) ₹15 (d) ₹40
21. 21.🧩 Tara bought 5 pens and a lunch box for ₹310 in all. Each pen cost the same. What did one pen cost? (a) ₹305 (b) ₹310 (c) ₹62 (d) not enough info
22. 22.🧩 Kabir bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹240 (d) ₹60
23. 23.🧩 Arjun is 9 years old. Tara is 9 years older than Arjun. How old is Tara? (a) 19 (b) 9 (c) not enough info (d) 18
24. 24.🧩 Nisha is 10 years old. Aarav is 4 years older than Nisha. How old is Aarav? (a) not enough info (b) 14 (c) 15 (d) 4
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
26. 26.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 35 (c) 40 (d) 12
27. 27.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) not enough info (b) 15 (c) 20 (d) 8
28. 28.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
29. 29.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 10 PM (d) 9 PM
30. 30.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
31. 31.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
32. 32.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Ishaan is 6 years old. Diya is older than Ishaan. How old is Diya? (a) 8 (b) 11 (c) not enough info (d) 7
35. 35.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 11 (c) 32 (d) 28
36. 36.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
37. 37.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 45 (b) 13 (c) 40 (d) not enough info
38. 38.🧩 Aarav is 11 years old. Ishaan is 6 years older than Aarav. How old is Ishaan? (a) 17 (b) not enough info (c) 18 (d) 6
39. 39.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
40. 40.🧩 Vihaan bought 2 balls and a lunch box for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹138 (b) not enough info (c) ₹70 (d) ₹140

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