Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 810 · 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.🧩 Meera bought 4 balls and a lunch box for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹106 (b) ₹27 (c) ₹110 (d) not enough info
2. 2.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
4. 4.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
5. 5.🧩 Aarav bought 3 notebooks and a water bottle for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹33 (b) ₹100 (c) ₹97 (d) not enough info
6. 6.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 24 (b) not enough info (c) 28 (d) 10
7. 7.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 7 PM
8. 8.🧩 Kabir bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹60
9. 9.🥭 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
10. 10.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
11. 11.🧩 Saanvi is 12 years old. Kabir is older than Saanvi. How old is Kabir? (a) not enough info (b) 17 (c) 13 (d) 14
12. 12.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 30 (b) not enough info (c) 10 (d) 25
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
14. 14.🧩 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
15. 15.🧩 Kabir is 8 years old. Saanvi is older than Kabir. How old is Saanvi? (a) 10 (b) 13 (c) 9 (d) not enough info
16. 16.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
17. 17.🧩 Saanvi bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹60 (d) ₹20
18. 18.🧩 Ishaan bought 2 notebooks and a cap for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹90 (c) ₹178 (d) not enough info
19. 19.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
21. 21.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
22. 22.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
23. 23.🧩 Rohan is 7 years old. Kabir is older than Rohan. How old is Kabir? (a) 9 (b) not enough info (c) 12 (d) 8
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
25. 25.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
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Meera is 9 years old. Ananya is 2 years older than Meera. How old is Ananya? (a) 11 (b) 2 (c) 12 (d) not enough info
29. 29.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
31. 31.🧩 Aarav bought 2 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) not enough info (c) ₹75 (d) ₹148
32. 32.🧩 Diya bought 6 notebooks and a water bottle for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹204 (d) ₹210
33. 33.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
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.🧩 Nisha bought 6 notebooks and a cap for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) not enough info (c) ₹114 (d) ₹20
36. 36.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
37. 37.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
38. 38.🧩 Meera is 10 years old. Rohan is 4 years older than Meera. How old is Rohan? (a) not enough info (b) 14 (c) 15 (d) 4
39. 39.🧩 Kabir is 12 years old. Saanvi is older than Kabir. How old is Saanvi? (a) 13 (b) not enough info (c) 14 (d) 17
40. 40.🧩 Ananya is 8 years old. Meera is older than Ananya. How old is Meera? (a) not enough info (b) 9 (c) 10 (d) 13

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