Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 250 · 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.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
3. 3.🧩 Nisha is 9 years old. Saanvi is 3 years older than Nisha. How old is Saanvi? (a) not enough info (b) 12 (c) 13 (d) 3
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Tara bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹75
6. 6.🧩 Arjun is 12 years old. Ananya is 6 years older than Arjun. How old is Ananya? (a) 18 (b) 19 (c) 6 (d) not enough info
7. 7.🧩 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
8. 8.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 20 (d) 15
9. 9.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 9 PM (c) 10 PM (d) 6 PM
10. 10.🥭 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, check more (c) yes, it is certain (d) no mango is sweet
11. 11.🧩 Meera is 8 years old. Kabir is 6 years older than Meera. How old is Kabir? (a) 6 (b) 14 (c) not enough info (d) 15
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
14. 14.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) not enough info (c) 18 (d) 9
15. 15.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Diya is 7 years old. Ananya is older than Diya. How old is Ananya? (a) 12 (b) 9 (c) not enough info (d) 8
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Vihaan bought 5 pens for ₹175 in all. Each pen cost the same. What did one pen cost? (a) ₹175 (b) not enough info (c) ₹40 (d) ₹35
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
22. 22.🧩 Arjun is 8 years old. Nisha is 2 years older than Arjun. How old is Nisha? (a) not enough info (b) 11 (c) 10 (d) 2
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
24. 24.🧩 Kabir bought 5 mangoes and a bag for ₹280 in all. Each mango cost the same. What did one mango cost? (a) ₹56 (b) ₹275 (c) not enough info (d) ₹280
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
26. 26.🧩 Meera is 6 years old. Ishaan is 5 years older than Meera. How old is Ishaan? (a) 11 (b) 5 (c) not enough info (d) 12
27. 27.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Kabir is 12 years old. Saanvi is 6 years older than Kabir. How old is Saanvi? (a) 19 (b) 18 (c) 6 (d) not enough info
30. 30.🧩 Saanvi bought 3 balls and a lunch box for ₹195 in all. Each ball cost the same. What did one ball cost? (a) ₹192 (b) ₹195 (c) ₹65 (d) not enough info
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
32. 32.🧩 Tara is 10 years old. Ananya is older than Tara. How old is Ananya? (a) 12 (b) 11 (c) 15 (d) not enough info
33. 33.🧩 Ishaan bought 2 mangoes and a bag for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹128 (b) not enough info (c) ₹130 (d) ₹65
34. 34.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 4 PM
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
36. 36.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
37. 37.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
38. 38.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 60 (c) 12 (d) 6
39. 39.🧩 Tara bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) ₹40 (c) ₹200 (d) not enough info
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True

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