Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 287 · 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: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
2. 2.🧩 Nisha bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) ₹60 (c) not enough info (d) ₹120
3. 3.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
4. 4.🧩 Saanvi is 7 years old. Ishaan is 8 years older than Saanvi. How old is Ishaan? (a) 15 (b) 8 (c) not enough info (d) 16
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
10. 10.🧩 Aarav is 10 years old. Diya is 3 years older than Aarav. How old is Diya? (a) 14 (b) 3 (c) 13 (d) not enough info
11. 11.📊 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
12. 12.🧩 Ishaan is 9 years old. Vihaan is 9 years older than Ishaan. How old is Vihaan? (a) 18 (b) not enough info (c) 9 (d) 19
13. 13.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Aarav bought 4 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹180 (d) ₹45
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Saanvi bought 6 pens and a lunch box for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹28 (b) ₹164 (c) ₹170 (d) not enough info
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
19. 19.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
21. 21.🧩 Vihaan bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹300 (b) ₹60 (c) ₹65 (d) not enough info
22. 22.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) not enough info (c) 18 (d) 90
23. 23.🧩 Meera is 11 years old. Diya is 2 years older than Meera. How old is Diya? (a) not enough info (b) 2 (c) 13 (d) 14
24. 24.🧩 Vihaan bought 2 mangoes and a lunch box for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹110 (c) ₹108 (d) not enough info
25. 25.🧩 Nisha is 10 years old. Rohan is older than Nisha. How old is Rohan? (a) not enough info (b) 11 (c) 15 (d) 12
26. 26.🧩 Aarav is 8 years old. Meera is older than Aarav. How old is Meera? (a) 9 (b) 13 (c) not enough info (d) 10
27. 27.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
29. 29.🧩 Ananya bought 2 pens and a bag for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹138 (b) ₹140 (c) ₹70 (d) not enough info
30. 30.🧩 Arjun bought 6 mangoes for ₹330 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹330 (c) ₹60 (d) ₹55
31. 31.🧩 Diya bought 4 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹80
32. 32.🧩 Aarav is 8 years old. Tara is older than Aarav. How old is Tara? (a) 9 (b) 10 (c) 13 (d) not enough info
33. 33.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
34. 34.🧩 Rohan bought 5 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹100 (c) ₹25 (d) ₹20
35. 35.🧩 Tara bought 5 pens and a water bottle for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹175 (b) ₹36 (c) not enough info (d) ₹180
36. 36.🧩 Vihaan is 7 years old. Aarav is 6 years older than Vihaan. How old is Aarav? (a) not enough info (b) 13 (c) 6 (d) 14
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
38. 38.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
39. 39.🧩 Diya is 9 years old. Kabir is older than Diya. How old is Kabir? (a) 14 (b) 10 (c) not enough info (d) 11
40. 40.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) 10 PM (d) not enough info

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