Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 5 · 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.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
4. 4.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
5. 5.🧩 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
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Aarav is 6 years old. Arjun is older than Aarav. How old is Arjun? (a) 11 (b) not enough info (c) 7 (d) 8
10. 10.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
12. 12.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Aarav bought 4 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹120
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Tara bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹80 (c) not enough info (d) ₹20
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) yes, it is certain (c) no mango is sweet (d) no, check more
20. 20.🧩 A box has 4 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 12 (c) 32 (d) 40
21. 21.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 7 PM
22. 22.🧩 A box has 8 rows of apples, with 9 in each row. How many apples are in the box? (a) 81 (b) 17 (c) 72 (d) not enough info
23. 23.🧩 Rohan is 9 years old. Kabir is older than Rohan. How old is Kabir? (a) 14 (b) not enough info (c) 11 (d) 10
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
26. 26.🧩 Aarav is 6 years old. Ishaan is 2 years older than Aarav. How old is Ishaan? (a) 8 (b) 2 (c) 9 (d) not enough info
27. 27.🧩 Vihaan bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹65 (c) ₹300 (d) ₹60
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
29. 29.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
30. 30.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 9 PM (d) 6 PM
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
33. 33.🧩 Ananya bought 5 balls and a cap for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹295 (b) ₹60 (c) ₹300 (d) not enough info
34. 34.🧩 Saanvi bought 5 notebooks and a bag for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹270 (b) not enough info (c) ₹275 (d) ₹55
35. 35.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
36. 36.🧩 Ananya bought 3 pens and a lunch box for ₹205 in all. Each pen cost the same. What did one pen cost? (a) ₹202 (b) ₹205 (c) not enough info (d) ₹68
37. 37.🧩 Ananya bought 2 balls for ₹70 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹70 (c) ₹35 (d) ₹40
38. 38.🧩 Aarav bought 3 balls and a bag for ₹150 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹147 (d) ₹150
39. 39.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
40. 40.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink

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