Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 247 · 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 eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
5. 5.🧩 Meera is 12 years old. Arjun is older than Meera. How old is Arjun? (a) 14 (b) not enough info (c) 17 (d) 13
6. 6.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
7. 7.🧩 Ananya bought 4 notebooks and a lunch box for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹216 (b) ₹55 (c) not enough info (d) ₹220
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
11. 11.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Arjun is 9 years old. Aarav is older than Arjun. How old is Aarav? (a) 10 (b) 11 (c) not enough info (d) 14
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Meera bought 3 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹120 (c) ₹45 (d) ₹40
16. 16.🧩 Ishaan bought 4 mangoes for ₹140 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹140 (c) ₹35 (d) ₹40
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
20. 20.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
21. 21.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
22. 22.🧩 Kabir is 10 years old. Nisha is older than Kabir. How old is Nisha? (a) 11 (b) 12 (c) 15 (d) not enough info
23. 23.🧩 Kabir is 9 years old. Arjun is 4 years older than Kabir. How old is Arjun? (a) 13 (b) 4 (c) 14 (d) not enough info
24. 24.🧩 Ananya is 9 years old. Saanvi is 2 years older than Ananya. How old is Saanvi? (a) 11 (b) 12 (c) not enough info (d) 2
25. 25.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
26. 26.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
27. 27.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
32. 32.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Nisha is 6 years old. Vihaan is older than Nisha. How old is Vihaan? (a) 7 (b) 8 (c) 11 (d) not enough info
36. 36.🧩 Arjun bought 4 mangoes and a cap for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹296 (b) not enough info (c) ₹300 (d) ₹75
37. 37.🧩 Nisha is 8 years old. Meera is older than Nisha. How old is Meera? (a) 13 (b) 10 (c) not enough info (d) 9
38. 38.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
39. 39.🥭 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) no mango is sweet (d) yes, it is certain
40. 40.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 60 (d) 6

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