Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 196 · 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? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
2. 2.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 4 PM (c) not enough info (d) 7 PM
3. 3.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
4. 4.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
5. 5.🧩 Nisha is 9 years old. Diya is 4 years older than Nisha. How old is Diya? (a) not enough info (b) 14 (c) 4 (d) 13
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
7. 7.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
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Nisha bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) ₹105 (c) not enough info (d) ₹40
10. 10.🧩 Ishaan bought 4 notebooks and a bag for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) ₹66 (c) ₹17 (d) not enough info
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
13. 13.🧩 Kabir bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹60
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
16. 16.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
17. 17.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
18. 18.🧩 Saanvi bought 4 mangoes and a lunch box for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹126 (b) not enough info (c) ₹130 (d) ₹32
19. 19.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
20. 20.🧩 Kabir is 9 years old. Aarav is 8 years older than Kabir. How old is Aarav? (a) 8 (b) not enough info (c) 17 (d) 18
21. 21.🧩 Ananya is 10 years old. Nisha is older than Ananya. How old is Nisha? (a) 15 (b) 11 (c) 12 (d) not enough info
22. 22.🧩 Nisha is 6 years old. Saanvi is 4 years older than Nisha. How old is Saanvi? (a) 4 (b) 11 (c) not enough info (d) 10
23. 23.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
24. 24.🧩 Arjun bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹75
25. 25.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 64 (d) 72
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
28. 28.🧩 Diya is 11 years old. Aarav is 9 years older than Diya. How old is Aarav? (a) 21 (b) 20 (c) 9 (d) not enough info
29. 29.🧩 Vihaan is 8 years old. Tara is 9 years older than Vihaan. How old is Tara? (a) 17 (b) 9 (c) not enough info (d) 18
30. 30.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 35 (d) 40
31. 31.🧩 Vihaan bought 2 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹50 (c) ₹25 (d) not enough info
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Meera bought 3 kites and a cap for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹56 (b) not enough info (c) ₹170 (d) ₹167
35. 35.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 6 PM
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
37. 37.🧩 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
38. 38.🥭 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
39. 39.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
40. 40.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 11 (b) 35 (c) 28 (d) not enough info

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