Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 554 · 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.🧩 Vihaan bought 5 mangoes and a lunch box for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹70 (b) ₹65 (c) ₹14 (d) not enough info
2. 2.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
3. 3.🧩 Kabir bought 4 pens and a cap for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹37 (b) ₹150 (c) not enough info (d) ₹146
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Nisha bought 3 balls and a water bottle for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹110 (b) ₹107 (c) not enough info (d) ₹36
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
11. 11.🧩 Rohan bought 3 mangoes and a cap for ₹65 in all. Each mango cost the same. What did one mango cost? (a) ₹21 (b) ₹62 (c) ₹65 (d) not enough info
12. 12.🧩 Meera bought 5 markers and a water bottle for ₹245 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) not enough info (c) ₹245 (d) ₹49
13. 13.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
14. 14.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
15. 15.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
17. 17.🧩 Kabir bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹55 (c) ₹275 (d) not enough info
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
19. 19.🧩 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
20. 20.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
21. 21.🧩 Meera bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹175 (d) ₹40
22. 22.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
23. 23.🧩 Diya is 11 years old. Meera is 9 years older than Diya. How old is Meera? (a) 9 (b) not enough info (c) 21 (d) 20
24. 24.🧩 A box has 7 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 28 (b) 11 (c) 32 (d) not enough info
25. 25.🧩 Saanvi is 11 years old. Aarav is older than Saanvi. How old is Aarav? (a) 13 (b) not enough info (c) 16 (d) 12
26. 26.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) no, check more (d) yes, mangoes match
27. 27.🧩 Aarav is 7 years old. Saanvi is 2 years older than Aarav. How old is Saanvi? (a) 9 (b) not enough info (c) 2 (d) 10
28. 28.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 9 (b) 20 (c) not enough info (d) 24
29. 29.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
32. 32.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
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
36. 36.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 8 PM
37. 37.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
38. 38.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 3 PM (c) 7 PM (d) not enough info
39. 39.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True

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